Sycn iphone calendar & music to different PC?

Hi there,
I have 2 computers,the one is for business and the other is private.I just want to sync a calendar on one computer (business) and the music on another one (private),but everytime i try to synchronise only the calendar with itunes homesharing, it deletes all my music on my iphone.Is there any way to solve this problem???
Any help will be greatly appreciated!